生物质挤压成型数值模拟及模孔参数优化  

Numerical Simulation of Biomass Extrusion and Optimization of the Hole Parameters

作　　者：王秀梅[1] 郭智勇 饶家凯 WANG Xiu-mei;GUO Zhi-yong;RAO Jia-kai(School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学机电工程与自动化学院,上海200444

出　　处：《机械设计与制造》2024年第7期260-264,268,共6页Machinery Design & Manufacture

摘　　要：为研究生物质挤压成型过程中物料的变化规律,针对生物质材料在压实过程中逐渐变化的特性,以弹塑性理论为基础,通过一种修正的Drucker-Prager Cap材料本构模型,借助有限元分析软件ABAQUS及其二次开发子程序VUSDFLD模拟物料单向压制过程,并验证该模型的准确性。对环模单模孔的制粒过程进行模拟研究,设计正交试验获得模孔参数对成型密度以及比能耗的影响规律,进而对模孔参数进行优化分析。结果表明:修正的Drucker-Prager Cap本构模型能够准确的模拟生物质材料的挤压成型过程;增大锥孔深度以及锥孔锥度均可提高物料的成型密度和比能耗,以成型密度和比能耗为评价指标,最优参数组合为锥孔深度7mm,锥度60°。Based on the elastoplastic theory,a modified Drucker-Prager Cap material constitutive model is used to research the changing law of materials in the pelleting process.With the help of the finite element analysis software ABAQUS and its secondary development subroutine VUSDFLD,the pelleting process is simulated and the accuracy of the model is verified.Orthogonal experiments are carried out to study the influence of die hole parameters on the forming density and energy consumption,and then the die hole parameters are improved.The results show that the constitutive model can accurately simulate the pelleting process.The forming density and energy consumption of the material can raise with the inceasing of the cone depth and the taple.The optimal combination of parameters is the depth of 7mm and the taper of 60°.

关 键 词：生物质 修正的Drucker-Prager Cap本构模型 有限元分析 二次开发 参数优化 

分 类 号：TH16[机械工程—机械制造及自动化]